John McIntyre, whom James Wolcott calls "the Dave Brubeck of the art and craft of copy editing," writes on language, editing, journalism, and other manifestations of human frailty. Comments welcome. Identifying his errors relieves him of the burden of omniscience. Write to jemcintyre@gmail.com, befriend at Facebook, or follow at Twitter: @johnemcintyre. Back 2009-2012 at the original site, http://weblogs.baltimoresun.com/news/mcintyre/blog/ and now at www.baltimoresun.com/news/language-blog/.

Thursday, January 10, 2013

A technical question, and an appeal for help

Perhaps some of you who are knowledgeable can help me with an irritating problem.

I work on an iMac at home, and nearly every day I get shut out of Facebook or Twitter on Firefox or Safari. Firefox delivers a "This Connection is Untrusted" warning that says that Twitter has an untrusted security certificate, and Safari renders a similar security certificate error.

This happens when I leave either Facebook or Twitter logged on for an extended time, and the only remedy that I have figured out is to clear the history and restart the computer.

I never have this problem with the Dell on my desk at work, so I assume that the problem has something to do with the iMac rather than with Facebook or Twitter.

Is there something about the iMac's security settings that needs adjustment? I welcome suggestions from Apple fanciers.